R. australis

R. australis may refer to:
 * Ramphotyphlops australis, a non-venomous blind snake species
 * Raphia australis, the giant palm or rafia, a raffia palm species found in Mozambique and South Africa
 * Remora australis, the whalesucker, a fish species found worldwide in tropical and warm waters
 * Rhopalosyrphus australis, a hoverfly species in the genus Rhopalosyrphus
 * Rostanga australis, a sea slug species in the genus Rostanga
 * Rostratula australis, the Australian painted snipe, a medium-sized, long-billed wader species
 * Rickettsia australis